Extension-body for trucks, &amp;c.



e. B. MARX. EXTENSION BODY FOR TRUCKS, 6:0.

APPLICATION FILED JUNE 11, 1913.

Patented Aug. 4, 1914.

2 SHEETS-SHEET 1.

l l ulllll INVENTUR B) E; A A, QuzLQ ATTOR/VEYS WITNESSES M G. B. MARX. EXTENSION BODY roa TRUCKS, 6w. APPLIOATIOK IILIID JUNE 11, 1913.

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Patented Aug.

WITNE888 telescoping tubes trated an tail view, also on a extensible members.

tively,

UNITED STATES, PATENT orrron.

GEORGE B. MARX, OF NEW YORK,'N. Y.

' EXTENSION-BODY FOR TRUCKS, &o.

To all whom it may concern:

Be it known that I, Gnome B. Manx, a citizen of the United States, residing in the borough of Manhattan of the city of New York, in the county of New York, in the State of New York, have invented certain new and useful Improvements in Extension- Bodies for'Trucks, &o., of which thefollowing is a specification, reference being bad to the accompanying drawings, which form a part hereof.

This invention relates to the construction of bodies for wagons or trucks, either motor-propelled or horse-drawn, cars, etc., which must be lengthened or shortened according to the length of the load, such as lumber, timbers, structural-steel, etc., to be.

carried. The object of the invention is to produce a very strong extension body which can yet be manipulatedeasily. In the attainment of this object the longitudinal members ofthe frame or body are formed of and suitable provisions are made for securing such tubes to the-front and rear trucks or truck members, for reinforcing the longitudinal members when the frame or body is extended, andfor'facilitating the extension of the-body.

The invention will be more fully explained hereinafter with reference to the accompan ing drawings in which it is illusin which- Figure 1 isa view in longitudinal section on the plane indicated by the broken line 11 of Fig. 2, of a truck or wagon which is constructed in accordance with the invention. Fig. 2 is a top view of the parts shown in Fig. 1, the middle longitudinal member being shown 1n section. Figs. 3, 4 and 5- are detail views in transverse section, and on a somewhat larger scale, on the planes indicated by the broken lines 3-3, 4-4 and 55 respectively of Fig. 1. Fig. 6 is a delarger scale and partly in longitudinal section, illustrating particularly the construction of the longitudinal,

Figs. 7 and 8 are detail views in side elevation and plan respeciIluStrating particularly the devices concerned with the drawing of the reinforcing tube into position when the body isex- I tended.

The present improvements are concerned wholly with the extensible body or frame and do not involve directly the construction of the front and rear trucks, which may Specification of Letters Patent.

Application filed Tune 11, 1913. Serial No. 772,977."

therefore be of any desired or suitable construction. As indicated in the drawing the front truck comprises as usual. wheels 0, an axle a, springs a, and a frame a with its wear-plate a. Upon the wear-plate a rests a similar wear-plate Z) which is secured to cross bars I). This frame may also be provided with a plate I) for the reception of the usual king-pin b. The rear-truck, as indh cated in the drawings, may also comprise wheels 0, an axle 0, springs cross bars a and 0", and braces 0 Each longitudinal member of the frame or body consists of an internal tube (Z which is firmly secured at its forward end to the forward truck frame, or rather to the cross bars b, as by suitablebolts J; an external tube 6, which telescopes upon the internal tube (Z and is firmly secured at its rear end to the rear truck, as by suitable yoke bolts 0; and an external reinforcing sleeve or tube 7' which surrounds and is movable upon the tube 0. The forward iportion of the tube 6 is slotted on its undersidle, as at 6 to straddle the bolts 03 and the blocks (1 which may be interposed between each cross bar I) and each tube 0.

Longitudinal girders g are secured at their rear ends to the rear truck and, when the body is shortened, rest at their forward ends upon the cross bars b.

Bars h are secured at their forward ends to the cross bars d and pass through guides it united, so as to be moved together, by a bar I, rovided with straps Z and resting upon gulde bars m which may be suitably secured to the under sides of t e girders g. \Vhen the body is extended, so that the outer tubes e are drawn back over the inner tubes (7, so that their slotted portions stand between Patented Aug. 4, 1914.

the rear cross bar I) and the cross bar '1',

the reinforcing tubes or sleeves are placed so as to cover the slotted portions of the tubes e. The necessary movement of the tubes f might be effected by a nipulation, but provision 18 construction shown 1n the drawings,

separate mamade, in the whereby, as the frame or body is extended, the reinforcing tubes f are moved relatively to the outer tubes e. As shown latches n are pivoted upon theends of one of the cross bars and are adapted to engage the ends of the cross bar Z, so that when the forward truck is moved forward wit-h respect to the rear 4 truck, the reinforcing sleeves f are also moved forward with it so as to cover the slotted ends of the outer tubes e. As the body may be extended more than the length of the reinforcing sleeves, it is desirable that provisions be made whereby the slotted ends of the tubes 6 shall not be withdrawn from the reinforcing sleeves f. Accordingly the latches n should be disengaged from the bar Z before the slotted ends of the tubes 6 are withdrawn from the reinforcing sleeves 7". For this purpose supports 0 are secured to the girders g and are provided with camlike ends 0 which, when the roper displacement of the reinforcing sleeves has been at? tain'ed, lift the latches from engagement with the bar Z, the hooked ends of the latches being supported by the supports 0 during the further forward movement of the forward truck withrespect to the girders It will be understood that various changes in details of construction and arrangement maybe made Without departing from the spirit. of the invention.

I claim as my invention 1. An extensible body for trucks, etc, hav ing telescoping longitudinal members secured respectively to the forward and. rear portions of the body, meansto reinforce said members when the truck or body is extended, and means carried by one portion of the body and in operative engagement with said reinforcing means to position automatically said reinforcing means with respect to said members when the body is extended.

2. in extensible body for trucks, etc., having telescoping longitudinal tubes secured respect vely tothe forward and rear portion of the body when the body is extended, and means carried by a relatively movable portion of the body to disengage automatically the latches from the sleeves at a predetermined point. 7 3. An extensible body for trucks, etc., having telescoping longitudinal tubes, means to secure the tubes respectively to the forward and rear portions of the body and blocks through which the securing means for the inner tubes pass interposed between the inner tubes and the portion of the body to which said inner tubesare secured, the outer 4 tubes being slotted to straddle said blocks to permit the complete telescoping of the tubes.

4. An extensible body for trucks, etc., having telescoping longitudinal tubes, means to secure the tubes respectively to the forward and rear portions of the body, the outer tubes being slotted to embrace the securing means for the inner tubes and sleeves surrounding the outer tubes to embrace and reinforce the slotted portions thereof when the body is extended.

5. An extensible body for trucks, etc., having tubular telescoping reach members secured respectively to the forward and rear portions of the body, independent longitudinal girders secured at one end to one portion of the body and adapted to have their free ends rest on the other portion ofthe body when the body is shortened.

This specification signed and witnessed this ninth day of June A. D., 1913.

- t GEORGE E. MARX.

Signed in presence of ELLA J. Knusnn, "Won'rnm GTON Curriculum. 

